Apparatus for making hoops



A. H. BURKEMAN. APPQRATUSFOR MAKING HOOPS.

APPLICATION FILED MAY24.1919. Patented Oct, 12,1920.

LL L5 UNITED STATES PATENT OFFICE.

AXEL HERMAN BURKEMAN, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO DRICO SILO COMPANY, OF MINNEAPOLIS, MINNESOTA, A COPARTNERSHIP CGMPOSED OF A. J. HAYES, H. C. TAYLOR, AND 0. O. HAYES.

APPARATUS FOR MAKING HOOPS.

Application filed May 24,

To all whom it may concern:

Be it known that I, AxnL H. BURKEMAN, a citizen of the United States, and resident of Minneapolis, Hennepin county, Minnesota, have invented a new and useful Apparatus for Making Hoops, of which the following is a specification.

This invention relates to hoop making machinery and the object is to provide improved means for making arc-shaped wooden sections adapted to be secured together in hoops for use in the construction and erection of cylindrical receptacles and containers such as silos. The invention is illustrated in the accompanying drawing, in which;

Figure 1 is a plan view of the machine.

Fig. 2 is an elevation of the machine.

Referring to the drawing by reference numerals, 36 designates an arc-shaped table or bench which is suitably supported at the desired height by legs, as shown in Fig. 2. The bench 36 is perforated with a plurality of holes 37. Suitable brackets 38, of any desired number, are mounted on the bench 36, and are secured thereto by bolts 39. The brackets 38 are arranged with their bases transversely of the bench on appropriate radial lines, and a back plate 40 is fixed to the upright portions of said brackets. The brackets are adjusted into such relative positions as to hold the back plate 40 on an arc, and the length of the back plate is somewhat greater than one-quarter of a circle of which any are assumed by it is a part. The back plate 40 is also numerously perforated as indicated by the holes 41. Pegs or stops 42 are provided and are adapted to be mounted selectively in holes 37. p

The hoop sections made in this machine are constructed by securing together a number (preferably four) of slats 35. These slats are preferably previously bent in a suitable wood bending machine, so that they will more readily conform with the curve of the back plate 40.

When using the machine the back plate is first adjusted into the desired are by adjusting the brackets 38. Then a bent slat 35 is placed in nesting relation against the inner face of the back plate. One end of this first slat may engage against either a bracket 38 or a peg 42 and the other end is Specification of Letters Patent.

Patented 001;. 12, 1920. 1919. Serial No. 299,652.

then also held by a peg or stop 42, so as to limit any tendency of the slat to straighten. Then another slat 35 is mounted in nesting relation with the first slat and the ends thereof are engaged by pegs 42 to limit any tendency of the second slat to straighten. Third and fourth slats are then nested successively against the second slat, all the slats having their ends arranged in staggered relation with the adjacent slats and .held by the pegs 42. As the slats are successively placed in position they are securely nailed to each other from their inner sides. Then the four slats may be thoroughly nailed together by nails driven through the holes 41 in the back plate 40, which holes are sufficiently large for a hammer head to pass through when driving home the nails.

After the slats are thus securely nailed together they are removed from the bench 36, and are crated and dried if previously steamed for bending purposes. Each section as thus assembled constitutes onefourth of one of the hoops, which hoops are then assembled to form circles at the place of use, the end portions of adjacent sections being overlapped and nailed together and then put into spaced horizontal position to receive upright boards. In constructing silos the upright boards are preferably nailed both to the inside and to the outside of the hoops so that an air space will be created between the two.

It is understood that suitable modifications may be made in the construction and use of this machine if such modifications come within the scope of the appended claims.

Having now therefore fully shown and described my invention what I claim to be new and desire to protect by Letters Patent is:

1. A device of the class described consisting of a suitable support, an are shaped back plate secured on the support and adapted to receive on its inner side strips to be nailed together for hoop sections, means for holding said strips together in assembled relation against said back plate.

2. A device of the class described consisting of a suitable support, an are shaped back plate secured on the support and adapted to receive upon its inner side a plurality of curved strips, means for retaining said strips in staggered positions.

3. A device of the class described consisting of a suitable support, an arc'shaped back plate secured on the support and adapted to receive upon its inner side a plurality of curved strips, stops on said supports against which the ends of said strips may engage.

Signed at Minneapolis; in the county of 10 Hennepin and State. of Minnesota, this 20th day of May, 1919. v

AXEL 'HERMAN BURKEMAN. 

